That isn't what "fraud" means in this context. Ad fraud is when you have something other than a real user loading or clicking on ads. For example, I could stand up a headless browser to click on the ads on my site. This would get me more of a payout from my advertisers, but would also be fraud.
A stable identifier makes identifying this sort of behavior much easier.
(Disclosure: I work on ads at Google, speaking only for myself)
A stable identifier makes identifying this sort of behavior much easier.
(Disclosure: I work on ads at Google, speaking only for myself)